cf715f4b7e
dm-verity needs to access data blocks by virtual address in three different cases (zeroization, recheck, and forward error correction), and one more case (shash support) is coming. Since it's guaranteed that dm-verity data blocks never cross pages, and kmap_local_page and kunmap_local are no-ops on modern platforms anyway, just unconditionally "map" every data block's page and work with the virtual buffer directly. This simplifies the code and eliminates unnecessary overhead. Reviewed-by: Sami Tolvanen <samitolvanen@google.com> Acked-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.